4 Graphics Cards on Z170 OC Formula

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   Hello,
I would like to use 4 GTX 1080s on my Z170 OC Formula.

But if I install 4 of them, SATAs and some of USBs do not get detected. Thus, the machine won't boot up with the error code A2. 

According to the manual, both of 3 graphics cards config and 4 graphics cards config consume 20 lanes. The former works without any issues, but it seems the latter has more constraints as above.

I know Z170 has only up to 26 HSIO lanes, and in which PCIe, SATAs, and USBs lanes are shared. So I looked for such details about the design of this board how lanes are shared, but didn't find any.

Is there such information available?

Thanks!

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ggsato Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 11 Jan 2017 Status: Offline Points: 6	Post Options Post Reply Quote ggsato Report Post Thanks(0) Quote Reply Topic: 4 Graphics Cards on Z170 OC Formula Posted: 11 Jan 2017 at 11:03am
	Hello, I would like to use 4 GTX 1080s on my Z170 OC Formula. But if I install 4 of them, SATAs and some of USBs do not get detected. Thus, the machine won't boot up with the error code A2. According to the manual, both of 3 graphics cards config and 4 graphics cards config consume 20 lanes. The former works without any issues, but it seems the latter has more constraints as above. I know Z170 has only up to 26 HSIO lanes, and in which PCIe, SATAs, and USBs lanes are shared. So I looked for such details about the design of this board how lanes are shared, but didn't find any. Is there such information available? Thanks!